.htaccess for multidomain site

.htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteCond %{HTTP_HOST} ^(www\.)?(.*)$ [NC]
RewriteCond %{REQUEST_URI} !^/%2/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /%2/$1

RewriteCond %{HTTP_HOST} ^(www\.)?(.*)$ [NC]
RewriteRule ^(/)?$ %2/index.php

</IfModule>

# Prevent viewing of .htaccess file
<Files .htaccess>
	order allow,deny
	deny from all
</Files>